# 查看
# select * from user;

# 增加
# insert into user values(1,'alex');
# insert into user values(2,'wusir'),(3,'太亮');

# 修改
# update user set name = 'barry';  # 不用
# update user set name = 'alex' where id = 1;
# update user set name = 'alex',id = 2 where id = 1;

# 删除
# delete from user;  # 清空表 不用
# delete from user where id = 3;


